Add OOPSLA'26 paper and ICSE'27 paper

README.md

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   - Tai-e ships with a new frontend, providing faster and more reliable conversion from Java programs to Tai-e IR.
   - Android app analysis is supported through a PacDroid-powered plugin integrated with pointer analysis.
   - Spring DI and WEC analysis is supported through the Spring analysis plugin.
+- Our paper _"When Absence Speaks: A Null-Aware Approach for Taint Analysis"_ has been accepted by <ins>ICSE'27</ins>. This work presents a simple yet effective approach for recovering missing taint flows, improving the vulnerability detection capability of general-purpose Java taint analysis.
+- Our paper _"Heap Abstraction via Early-Confluent Object Merging for Pointer Analysis"_ has been accepted by <ins>OOPSLA'26</ins>. This work presents Valve, a novel heap abstraction technique that significantly accelerates pointer analysis while preserving high precision.
 - Our paper _"Two Approaches to Fast Bytecode Frontend for Static Analysis"_ has been accepted by <ins>OOPSLA'25</ins>. This paper presents Tai-e's new bytecode frontend, which is significantly faster and more reliable than existing frontends.
 - Our paper _"Pointer Analysis for Database-Backed Applications"_ has been accepted by <ins>PLDI'25</ins>. This paper describes an end–to–end pointer analysis for Java database–backed application developed on top of Tai-e.
 - Our paper _"PacDroid: A Pointer-Analysis-Centric Framework for Security Vulnerabilities in Android Apps"_ has been accepted by <ins>ICSE'25</ins>. This work demonstrates Tai-e's new capability in Android analysis, providing a simple yet effective approach for security analysis of Apps. This work earned the **Best Artifact Award**🏅.

docs/en/publications.adoc

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 = Publications
 
+* Zhiwei Zhang, Menglong Chen, Yufei Liang, Hengbin Zheng, Yinning Xiao, Tian Tan, Jie Liu, and Yue Li. _When Absence Speaks: A Null-Aware Approach for Taint Analysis_. In Proceedings of the 49th IEEE/ACM International Conference on Software Engineering, Dublin, Ireland, April 25--May 1 2027 (ICSE'27). (Accepted, to Appear).
+
+* Jinpeng Wang, Yufei Liang, Zhongsheng Zhan, Tian Tan, and Yue Li. _Heap Abstraction via Early-Confluent Object Merging for Pointer Analysis_. In Proceedings of the ACM on Programming Languages, Volume 10, Issue OOPSLA2, Oakland, California, United States, October 4--9 2026 (OOPSLA'26).
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 * Chenxi Li, Haoran Lin, Tian Tan, and Yue Li. _Two Approaches to Fast Bytecode Frontend for Static Analysis_. In Proceedings of the ACM on Programming Languages, Volume 8, Issue OOPSLA2, Singapore, October 12--18 2025. (OOPSLA'25)
 
 * Yufei Liang, Teng Zhang, Ganlin Li, Tian Tan, Chang Xu, Chun Cao, Xiaoxing Ma, and Yue Li. _Pointer Analysis for Database-Backed Applications_. In Proceedings of the 46th ACM SIGPLAN Conference on Programming Language Design and Implementation, Seoul, South Korea, June 16--20 2025 (PLDI'25).